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From: Arjan van de Ven <arjanv@redhat.com>
To: Adrian Bunk <bunk@fs.tum.de>
Cc: Linus Torvalds <torvalds@osdl.org>, Andrew Morton <akpm@osdl.org>,
	Jens Axboe <axboe@suse.de>, Matt Mackall <mpm@selenic.com>,
	linux-kernel@vger.kernel.org
Subject: Re: What policy for BUG_ON()?
Date: Mon, 30 Aug 2004 22:22:10 +0200	[thread overview]
Message-ID: <1093897329.2870.11.camel@laptop.fenrus.com> (raw)
In-Reply-To: <20040830201519.GH12134@fs.tum.de>

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On Mon, 2004-08-30 at 22:15, Adrian Bunk wrote:
> Let me try to summarize the different options regarding BUG_ON, 
> concerning whether the argument to BUG_ON might contain side effects, 
> and whether it should be allowed in some "do this only if you _really_ 
> know what you are doing" situations to let BUG_ON do nothing.
> 
> Options:
> 1. BUG_ON must not be defined to do nothing
> 1a. side effects are allowed in the argument of BUG_ON
> 1b. side effects are not allowed in the argument of BUG_ON
> 2. BUG_ON is allowed to be defined to do nothing
> 2a. side effects are allowed in the argument of BUG_ON
> 2b. side effects are not allowed in the argument of BUG_ON

since you quoted me earlier my 2 cents:
1) I would prefer BUG_ON() arguments to not have side effects; its just 
cleaner that way. (similar to assert)

2) if one wants to compiel out BUG_ON, I rather alias it to panic() than
to nothing.


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  reply	other threads:[~2004-08-30 20:23 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-08-30 20:15 Adrian Bunk
2004-08-30 20:22 ` Arjan van de Ven [this message]
2004-08-31  6:28   ` Jens Axboe
2004-08-31 11:14     ` Paulo Marques
2004-08-31  0:25 ` Linus Torvalds
2004-08-31 11:28   ` Adrian Bunk
2004-08-31 15:06 Albert Cahalan
2004-08-31 16:52 ` Linus Torvalds
2004-08-31 17:39   ` Albert Cahalan
2004-08-31 21:30     ` Kyle Moffett
2004-08-31 22:16       ` Michael Buesch
2004-08-31 23:32         ` Kyle Moffett

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